I was able to create a clone and my messages do migrate to the new table for my admin account. The clone is identical to our production site. And yet, it works on the clone, to an extent. If I use login as user to emulate a student, the error message still appears for that user.The main difference between the production site and the clone is the dB was exported and imported into the clone. I have tried optimizing and defragmenting the messages tables, and that didn't help either. I suspect the production site dB has an issue that prevents the adhoc script from converting the messages. Any ideas where else to look? thanks.